During midlife, individuals often report gaining weight, particularly around the middle. Although a number of factors can lead to this trend, new evidence suggests that a slowing metabolism is not one of them. Your metabolism can still play a key role, but maybe just not in the way we think…. What does the evidence show? Your basal metabolic rate (the calories required to stay alive) is influenced by a variety of factors including age, sex, genetics, body composition, hormones, physical...